The Superior 18-1601 Rubber Coil Spring Booster is a small antique item designed for enhancing the spring action in various mechanical devices. Manufactured by the reputable brand SUPERIOR, this product features a painted exterior and dimensions of 7 x 5 x 1 inches. With a weight of only 0.01 ounces, this rubber spring booster is lightweight yet durable, making it a valuable addition for improving the functionality of vintage machinery or antique equipment. Its discontinued status adds to its rarity and collectibility among antiques enthusiasts.