Comparison : Item # 510 1/8 x 1/4, Clear Tubing (Blue Tint) FDA
Item # 510 3/16 x 5/16, Clear Tubing (Blue Tint) FDA
Item # 510 1/4 x 3/8, Clear Tubing (Blue Tint) FDA
Item # 510 1/4 x 1/2, Clear Tubing (Blue Tint) FDA
Item # 510 5/16 x 7/16, Clear Tubing (Blue Tint) FDA