This product is made with fine quality brass and rubber sleeve, perfect accessory for your kayak, canoe, boat. Features: 10PCS, 20PCS, 50PCS, 100PCS, different kinds of quantity for your choice. Well nuts are made with brass and rubber sleeve, perfect accessory for your kayak, canoe, boat. Easy to operate, suitable for personal or professional use. Tightening a threaded screw into the brass nut expands the insert to secure the fixing. Specifications: Item type: Rubber Well Nuts Material: Rubber+Brass Quantity: 10PCS, 20PCS, 50PCS, 100PCS(optional) Size: M5 Package weight: 10PCS: 18g/0.63ounces 20PCS: 36g/1.26ounces 50PCS: 90g/3.17ounces 100PCS: 180g/6.34ounces Package size: 10PCS: 1004020mm/3.931.570.78inches 20PCS: 18012020mm/7.084.720.78inches 50PCS: 25018020mm/9.847.080.78inches 100PCS: 25018020mm/9.847.080.78inches Package list: 10PCS*Nuts