EISCO 24PK Test Tubes, 30ml - Bakelite Screw Cap with Rubber Liner - Borosilicate 3.3 Glass - 3.9" x 1" - Round Bottom - Leak Proof 24 Number of Items:24 Lock-Holes

Lock-Holes

and we will answer your doubts in the first time

It also supports zero-crossing trigger technology

black and yellow wires to the power supply negative

Ideal for various locations such as offices

EISCO 24PK Test Tubes, 30ml - Bakelite Screw Cap with Rubber Liner - Borosilicate 3.3 Glass - 3.9" x 1" - Round Bottom - Leak Proof 24 Number of Items:24 Lock-HolesEISCO 24PK Test Tubes, 30ml Bakelite Screw Cap with Rubber Liner Borosilicate 3. 3 Glass 3. 9" x 1" Round Bottom Leak Proof Product Features INDUSTRIAL QUALITY Pack of 24, round bottom test tubes with a 30ml capacity. Each test tube is made of high quality, heavy duty, Borosilicate 3. 3 glass BAKELITE SCREW CAP Each test tube is fitted with a Bakelite screw cap with a rubber liner to ensure a leak proof seal DIMENSIONS Each test tube measures 3. 9"