Saim Black 3 Pc. Aluminum Heatsink Heat Dissipation Sink For Solid State Relay Aluminum heatsink are generally used in the heat treatment and the solid state relay. The fins increase the area of the board and thus provide for greater heat transfer. Made of durable aluminum, highly reliable and easy installation. Heat Sink only, Solid State Relay NOT INCLUDED here. Product Features Come with a aluminum heat sink provides long lasting usage, it will help dissipate the heat and protect your relay. Mounting Hole Dia :4mm/0.15";Mounting Hole Center Distance : 48.5mm/1.9" Material : Aluminum;Main Color : Black; Total Size : 12.5 x 5 x 7cm/4.9" x 1.96" x 2.75"(L*W*H) Designed specially for single phase solid state relay, a must component for temperature controller and other machinery control system. Net Weight : 583g; Package Content : 3 x Heatsinks,6 x Button Head Screws Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!