Check the listing for details. Goedrum B2 Drum Single Trigger set for DIY Electronic Bass Drum / DIY Kick Drum. Condition: New. Listed at 89.00 USD. Goedrum DIY No.343Note : ★ Any dimensions given are not measured with specialist equipment and are not guaranteed to be accurate in engineering terms. ★ We will combine shipping if you purchase multiple items. At the purchase of all your different items, please click “request an invoice” from us, so we can adjust the invoice and apply a shipping discount for you. If you need any assistance, please contact us. Thank you! l This product comes exactly as shown in the main photo. l This trigger can be installed under drumhead to transfer vibrations to most electronic drum sound modules.l You could use it to DIY 8"-24" electronic bass drum. l It has a long 1/4" stereo jack socket, great for using on acoustic drum shell or metal drum shell. l Assembly instructions are in the photos.Will need to drill a 12mm hole on drum shell for installing the 1/4" jack. Return policy : Please contact us first if there is a mistake on your purchase. If a return is necessary, we can refund for the price paid minus shipping costs. Returned items must be in the same condition as you received them. Buyer pays for return shipping.