Quality rubber stoppers. Resilient and long lasting. Dimensions, approximately : 25 mm x 27 mm x 23 mm( Length x Top Diameter x Bottom Diameter). As each batch of rubber stoppers can be slightly more or less dense we can only give an approximate piece count per pound. Fits 125mL Erlenmeyer Flask. Picture is a representation of the solid stoppers.
100% Satisfaction Guarantee: At Mansion Labs, we want to be sure that the item you choose is the right one for you. Within 30 days of delivery of your order, you may return any merchandise purchased from Mansion Labs in its original condition with your email order confirmation or packing slip. Restocking fees may apply. On items over $275 shipping within the US, we will even arrange free pick up or pay for returns shipping.