Lee"s Squeeze Bulb Siphon Starter is great to use with 1/2 I.D. hose and the Lee"s Ultra Gravel Vacx models 11544 11545 11555 11556 and 11560. With the included adapters fits 3/8" I.D. hose and Lee"s Ultra Gravel Vacs models 11551 11552 11553 and 11554."