Estes 1672 Blast-Off Model Rocket Engine Assortment Bulk Pack – 24 Engines 6 of each: A8-3, B6-4, C6-3 & C6-5 with Starters, Plugs & WaddingPLEASE NOTE: These are 18mm diameter engines. Please refer to the instructions that came with your rocket (or the rocket's product description) to determine engine compatibility. The Blast off Bulk Pack comes with an assortment of top selling model rocket engines (24 total), along with 30 starters, 24 starter plugs, and ~72 squares of recovery wadding 24 engines total, 4 different types. Includes: Six A8 3 Six B6 4 Six C6 3 Six C6 5 Bulk packs are

11" x 1/2" inch (3 x 15mm) rounded slots for PVC cards such as ID cards

A spare/replacement soldering iron can be purchased by searching for the following part number: 060588201B

The large faces and long stems of the 3" dial models are perfect for soil and compost testing

12 Coloring tablets

Operating instructions

It incorporates a sophisticated electronic circuit which enables the user to change the tip temperature from 320°F(160°C) to 900°C(480°C) without the need to change the tip or heating element

Unit Features: Sturdy

Product Dimensions (L x W x H): 170 x x 163

they'll explore the science behind cheesemaking and observe the accompanying chemical and microbiological changes and the resulting physical changes

Color Silver Height 1

Four encoders

Comes with numbered key